diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..a597d15
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,3 @@
+SERVER_DOMAIN = "nostr.hu"
+RELAY = "ws://127.0.0.1:8080"
+BLOSSOM = "http://127.0.0.1:3000"
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 033df5f..318bb28 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 .venv
 __pycache__
+.env
\ No newline at end of file
diff --git a/README.md b/README.md
index fd1abc1..88b7a58 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,10 @@ Nostr event kind `34128` is used for mapping from the file path (that comes afte
 Install
 =======
 
-`pip install -r requirements.txt`
+```
+cp .env.example .env
+pip install -r requirements.txt
+```
 
 Upload
 ======
diff --git a/blossom.py b/blossom.py
index 28a16e7..6b2e722 100644
--- a/blossom.py
+++ b/blossom.py
@@ -20,6 +20,7 @@ async def store(sk, data, blossom_server, sha256, path):
         tags=[
             ["t", "upload"],
             ["x", sha256],
+            ["size", len(data)],
             ["expiration", "1777777777"]
         ]
     )
diff --git a/hostr.py b/hostr.py
index 4aaf894..c31413a 100644
--- a/hostr.py
+++ b/hostr.py
@@ -1,13 +1,17 @@
+import os
 import sys
 import logging
 from aiohttp import web, ClientSession
+from dotenv import load_dotenv
 
 from monstr.client.client import Client, ClientPool
 from monstr.encrypt import Keys
 
-SERVER_DOMAIN = "nostr.hu"
-RELAY = "ws://127.0.0.1:8080"
-BLOSSOM = "http://127.0.0.1:3000"
+load_dotenv()
+
+SERVER_DOMAIN = os.getenv('SERVER_DOMAIN')
+RELAY = os.getenv('RELAY')
+BLOSSOM = os.getenv('BLOSSOM')
 FILEMAP_KIND = "34128"
 
 logging.basicConfig(level=logging.INFO)
@@ -68,4 +72,6 @@ async def serve_file(request):
     web.get("/", serve_file),
     web.get("/{path:.*}", serve_file)
 ])
-web.run_app(app, host='0.0.0.0', port=8000)
+
+if __name__ == "__main__":
+    web.run_app(app, host='0.0.0.0', port=8000)
diff --git a/requirements.txt b/requirements.txt
index bdf4927..8f5d84c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 aiohttp
 monstr
+python-dotenv
\ No newline at end of file
diff --git a/uploadr.py b/uploadr.py
index dca8a2d..8657d9c 100755
--- a/uploadr.py
+++ b/uploadr.py
@@ -7,13 +7,16 @@
 import hashlib
 import time
 from datetime import datetime
+from dotenv import load_dotenv
 
 from monstr.encrypt import Keys
 from monstr.client.client import Client
 from monstr.event.event import Event
 
-RELAY = "wss://relay.magnifiq.tech" # Right now it's hardcoded
-BLOSSOM = "https://blossom.nostr.hu" # Same here.
+load_dotenv()
+
+RELAY = os.getenv('RELAY')
+BLOSSOM = os.getenv('BLOSSOM')
 
 parser = argparse.ArgumentParser()
 parser.add_argument(