Docker file not working

[MaltePetersen]

I get the following error if I try to run the docker compose image:
ERROR: Service 'idm-keycloak' failed to build: COPY failed: no source files were specified
What can I do to resolve this?

Full output:
PS C:\Users\peter\Desktop\springio18-spring-keycloak-master\idm-system> docker-compose up
Creating network "idm-system_default" with the default driver
Pulling mongo (mongo:3.2.12)...
3.2.12: Pulling from library/mongo
47e616392c23: Pull complete
b8dc044ce904: Pull complete
4ccb5ca0e379: Pull complete
3b1e4f984392: Pull complete
8a6016a58337: Pull complete
a21527fa8188: Pull complete
44adcaad2c76: Pull complete
ac4de227c77e: Pull complete
d2f665d49ba4: Pull complete
766e94e08ac1: Pull complete
b89f35cc5a28: Pull complete
Digest: sha256:af40f41f870c15e41d48bf2433134e0577f97d5ebbf55c4a2214ed499026a08e
Status: Downloaded newer image for mongo:3.2.12
Pulling elasticsearch (elasticsearch:5.6.10)...
5.6.10: Pulling from library/elasticsearch
55cbf04beb70: Pull complete
1607093a898c: Pull complete
9a8ea045c926: Pull complete
1290813abd9d: Pull complete
8a6b982ad6d7: Pull complete
abb029e68402: Pull complete
d068d0a738e5: Pull complete
42ee47bb0c52: Pull complete
42c6b5a6562a: Pull complete
ba1b2c21f9b5: Pull complete
f4903f1452ba: Pull complete
1f7b5266b402: Pull complete
9aadd1a4883c: Pull complete
6910d8e3e686: Pull complete
b6fbb585b96b: Pull complete
Digest: sha256:88df4589f41dc41184e25df321a4ebb69b84e4aad73e9d352770f902ac70c17c
Status: Downloaded newer image for elasticsearch:5.6.10
Pulling graylog (graylog/graylog:2.4.6-1)...
2.4.6-1: Pulling from graylog/graylog
0bd44ff9c2cf: Pull complete
047670ddbd2a: Pull complete
ea7d5dc89438: Pull complete
f14138372253: Pull complete
c822581c11cd: Pull complete
2bfebb1ccea8: Pull complete
1d2a1447f71c: Pull complete
610001504afa: Pull complete
5dc83cba7bdf: Pull complete
835b3587e7d8: Pull complete
db9e3d9769c8: Pull complete
3efa3280ab58: Pull complete
7ec8a94ac48f: Pull complete
4b633f66f680: Pull complete
Digest: sha256:73b06680a884a57cfcb4c378e28bcfe2a0ec4a61b5c2a3d0ab89ee139d2a9504
Status: Downloaded newer image for graylog/graylog:2.4.6-1
Pulling idm-db (postgres:10.4-alpine)...
10.4-alpine: Pulling from library/postgres
8e3ba11ec2a2: Pull complete
fbb9adb8cff8: Pull complete
aa8817b9e00d: Pull complete
e162a11eb12c: Pull complete
788b2698f298: Pull complete
109af6d3e982: Pull complete
798f27e0089d: Pull complete
b5a994ed229e: Pull complete
4b6dfba335bd: Pull complete
Digest: sha256:b00851e5a07b910a18f9211cec807a1256cec38bbf7aa06859aba79acf79b3a8
Status: Downloaded newer image for postgres:10.4-alpine
Pulling idm-amq (rmohr/activemq:5.14.5-alpine)...
5.14.5-alpine: Pulling from rmohr/activemq
88286f41530e: Pull complete
009f6e766a1b: Pull complete
132a112fc74a: Pull complete
dcc50dc1edc1: Pull complete
Digest: sha256:dba6922c7931c9f9505092c8f19fe901638294540c4a14594c17fde2c5562227
Status: Downloaded newer image for rmohr/activemq:5.14.5-alpine
Building idm-keycloak
Step 1/29 : FROM jboss/keycloak:4.5.0.Final
4.5.0.Final: Pulling from jboss/keycloak
256b176beaff: Pull complete
e1a4e7884eb1: Pull complete
6293d5f85c78: Pull complete
1287ca895646: Pull complete
2180edd516e1: Pull complete
38ef400aca82: Pull complete
775b0cf2f831: Pull complete
Digest: sha256:c62037ee628b60f8e47b23802810094592a6e7b4be12bc8e23099627afb128d5
Status: Downloaded newer image for jboss/keycloak:4.5.0.Final
---> 7874d3a082ee
Step 2/29 : ENV KEYCLOAK_ADMIN_USER admin
---> Running in 7419c16c574d
Removing intermediate container 7419c16c574d
---> ebc24d1414b8
Step 3/29 : ENV KEYCLOAK_ADMIN_PASSWORD admin
---> Running in 7fbfe5cf904a
Removing intermediate container 7fbfe5cf904a
---> fbdd242289e4
Step 4/29 : ENV LOG_SERVER_URL udp:graylog
---> Running in b28cb8a0e03c
Removing intermediate container b28cb8a0e03c
---> 91ab34901732
Step 5/29 : ENV LOG_SERVER_PORT 12123
---> Running in 905d1203dfdc
Removing intermediate container 905d1203dfdc
---> cf31736e2431
Step 6/29 : ENV JDBC_URL JDBC_URL=jdbc:postgresql://sso-db/idm_keycloak_demo
---> Running in 8b1ae87a9405
Removing intermediate container 8b1ae87a9405
---> 4f28b3482a02
Step 7/29 : ENV JDBC_USER keycloak
---> Running in 40adb5659e94
Removing intermediate container 40adb5659e94
---> 4bfe46de043e
Step 8/29 : ENV JDBC_PASSWORD keycloak
---> Running in 5b8f686788e2
Removing intermediate container 5b8f686788e2
---> d945d5581fed
Step 9/29 : ENV JDBC_DRIVERNAME postgres
---> Running in 5a1d42c35747
Removing intermediate container 5a1d42c35747
---> b7138e041807
Step 10/29 : ENV ACTIVE_MQ_USER idm
---> Running in 5e38605e9363
Removing intermediate container 5e38605e9363
---> 66012295bd72
Step 11/29 : ENV ACTIVE_MQ_PASSWORD idm
---> Running in 2251028fb4ad
Removing intermediate container 2251028fb4ad
---> 41a251f76499
Step 12/29 : ENV ACTIVE_MQ_URL tcp://sso-amq:61616
---> Running in 0e85da7dc174
Removing intermediate container 0e85da7dc174
---> c86b483d4bba
Step 13/29 : ENV KEYCLOAK_EVENT_QUEUE idm.queue.keycloak.rawevents
---> Running in c71da79eca11
Removing intermediate container c71da79eca11
---> daf569c7d797
Step 14/29 : ENV KEYCLOAK_CONTEXT_PATH u/auth
---> Running in 7e0a0a7d64ea
Removing intermediate container 7e0a0a7d64ea
---> 3d9023e75997
Step 15/29 : ENV JAVA_OPTS -Xms128M -Xmx2G -XX:MetaspaceSize=128M -XX:MaxMetaspaceSize=256m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true -Djava.net.preferIPv4Stack=true
---> Running in d66adb770015
Removing intermediate container d66adb770015
---> 41e6954827bf
Step 16/29 : USER root
---> Running in 8eaef63182b6
Removing intermediate container 8eaef63182b6
---> 8936b3dfc9dc
Step 17/29 : RUN ln -f -s /usr/share/zoneinfo/Europe/Berlin /etc/localtime
---> Running in 4bf420f4954a
Removing intermediate container 4bf420f4954a
---> 5a062a4c5dd1
Step 18/29 : USER jboss
---> Running in c2b61d56de95
Removing intermediate container c2b61d56de95
---> 6a64138c20b7
Step 19/29 : ADD /modules /opt/jboss/keycloak/modules
---> 07fa973bc198
Step 20/29 : ADD /themes/springio18 /opt/jboss/keycloak/themes/springio18
---> 31facd4a8eb9
Step 21/29 : ADD /themes/wjax18 /opt/jboss/keycloak/themes/wjax18
---> f2d075fda4ad
Step 22/29 : COPY activemq-rar.rar /opt/jboss/keycloak
---> 9db0aa86b40b
Step 23/29 : COPY extensions/jms-event-forwarder/target/jms-event-forwarder*.jar /opt/jboss/keycloak/modules/de/tdlabs/keycloak/ext/jms-event-forwarder/main/jms-event-forwarder.jar
ERROR: Service 'idm-keycloak' failed to build: COPY failed: no source files were specified