change Dockerfile to use gunicorn, requiring some changes to the app.

Dockerfile

@@ -1,8 +1,11 @@
 FROM tensorflow/tensorflow:2.5.0
-WORKDIR /app
-COPY requirements.txt /app
-RUN mkdir -p /app/data && pip install -r /app/requirements.txt
+ENV PASTEY_WORKERS=2
+ENV PASTEY_THREADS=4
+ENV PASTEY_LISTEN_PORT=5000
+RUN pip install gunicorn
+COPY requirements.txt /app/
+RUN pip install -r /app/requirements.txt
 COPY . /app/
-EXPOSE 5000
-ENV PASTEY_DATA_DIRECTORY=/app/data  
-ENTRYPOINT ["python3", "app.py"]
+WORKDIR /app
+ENTRYPOINT ["sh", "-c", "gunicorn -w $PASTEY_WORKERS -t $PASTEY_THREADS -b :$PASTEY_LISTEN_PORT app:app"]
+EXPOSE $PASTEY_LISTEN_PORT

pastey/common.py

@@ -1,5 +1,8 @@
 from . import config
-from __main__ import guess
+if __name__ == '__main__':
+    from __main__ import guess
+else:
+    from app import guess
 import ipaddress
 from os import path
 from pathlib import Path
@@ -104,4 +107,4 @@ def build_url(request, path="/"):
     else:
         protocol = request.url.split('//')[0] if not config.force_https_links else "https:"
 
-    return protocol + "//" + domain + path
+    return protocol + "//" + domain + path

pastey/functions.py

@@ -1,4 +1,7 @@
-from __main__ import guess, app
+if __name__ == '__main__':
+    from __main__ import guess, app
+else:
+    from app import guess, app
 from . import config, common
 
 from os import path, remove

pastey/routes.py

@@ -1,4 +1,7 @@
-from __main__ import app, limiter, loaded_config
+if __name__ == '__main__':
+    from __main__ import app, limiter, loaded_config
+else:
+    from app import app, limiter, loaded_config
 from . import config, common, functions
 
 from flask import Flask, render_template, request, redirect, abort, make_response