Added a container option for deployment, since that's what I'll be doing. Added requests library to requirements. Authentication flow now happens with a form submission of an instance domain.

Dockerfile

@@ -0,0 +1,7 @@
+FROM python:alpine
+
+WORKDIR /var/www/
+
+COPY ./requirements.txt /var/www/requirements.txt
+
+RUN pip install -r /var/www/requirements.txt

app/app.py

@@ -12,17 +12,13 @@ oauth = OAuth(app)
 
 gotosocial = oauth.register(
     name='gotosocial',
-    # 010DGVDVM5ZN0D8W9WM0X59YMD 
-    # 01JFPCR4Q8FYP273DPCW8FGDMJ
-    client_id='010DGVDVM5ZN0D8W9WM0X59YMD',
-    # 917ab929-90f5-4c87-b902-be6bed0d3a4e 
-    # 5c190ea8-1984-4e05-b610-d7ed4d241079
-    client_secret='917ab929-90f5-4c87-b902-be6bed0d3a4e',
-    access_token_url='https://gts.werefox.cafe/oauth/token',
-    access_token_params={'response_type':'token', 'grant_type':'authorization_code', 'client_id':'010DGVDVM5ZN0D8W9WM0X59YMD', 'client_secret':'917ab929-90f5-4c87-b902-be6bed0d3a4e'},
-    authorize_url='https://gts.werefox.cafe/oauth/authorize',
+    client_id='',
+    client_secret='',
+    access_token_url='/oauth/token',
+    access_token_params={'response_type':'token', 'grant_type':'authorization_code', 'client_id':'', 'client_secret':''},
+    authorize_url='/oauth/authorize',
     authorize_params={'grant_type':'authorization_code'},
-    api_base_url='https://gts.werefox.cafe/api',
+    api_base_url='/api',
     client_kwargs={'scope': 'read'},
 )
 
@@ -32,6 +28,30 @@ def index():
     return render_template('index.html')
 
 
+@app.route('/set_domain', methods=['POST'])
+def set_domain():
+    if(request.method == 'POST'):
+        payload = {
+            'client_name':'gotosocial-fe',
+            'redirect_uris':url_for('index', _external=True)
+        }
+        response = post(f'https://{request.form["domain"]}/api/v1/apps', data=payload)
+        client_data = response.json()
+        gotosocial.client_id = client_data['client_id']
+        gotosocial.client_secret = client_data['client_secret']
+        gotosocial.access_token_params = {
+            'response_type':'token',
+            'grant_type':'authorization_code',
+            'client_id':client_data['client_id'],
+            'client_secret':client_data['client_secret']
+        }
+        gotosocial.access_token_url = f'https://{request.form["domain"]}{gotosocial.access_token_url}'
+        gotosocial.authorize_url = f'https://{request.form["domain"]}{gotosocial.authorize_url}'
+        gotosocial.api_base_url = f'https://{request.form["domain"]}{gotosocial.api_base_url}'
+        return redirect('/login')
+    else:
+        return "Sorry, but you can't get *GET* /set_domain, hun."
+
 @app.route('/login')
 def login():
     redirect_uri = url_for('authorize', _external=True)

app/templates/index.html

@@ -5,7 +5,11 @@
       <title>Some kind of Flask App</title>
     </head>
     <div>
-        <p>I guess you should input something</p>
+        <p>Put in your instance domain!</p>
+        <form method="POST" action={{url_for('set_domain')}}>
+          <input type="text" name="domain"></input>
+          <input type="submit" value="Go!"></input>
+        </form>
         <a href="/login">login</a>
     </div>
   </body>

deploy.sh

@@ -6,8 +6,10 @@ FLASK_NAME=flaskoauth
 FLASK_ENV=$1
 
 if [ "$FLASK_ENV" == "development" ] || [ "$FLASK_ENV" == "production" ]; then
-    cd app/
-    flask run --host=0.0.0.0
+    # cd app/
+    # flask run --host=0.0.0.0
+    FLASK_ENV=$FLASK_ENV docker compose up --build --remove-orphans -d && \
+    docker compose logs -f
 else
     echo "Please use 'development' or 'production' as an argument."
 fi

docker-compose.yml

@@ -0,0 +1,14 @@
+---
+version: "3"
+
+services:
+  app:
+    image: gotosocialfe:latest
+    build: .
+    volumes:
+      - ./app:/var/www/app
+    #environment:
+    #  -
+    ports:
+      - 5000:5000
+    command: 'sh -c "cd app && flask run --host=0.0.0.0"'

register_app.py

@@ -1,14 +0,0 @@
-#!/usr/bin/python
-
-from requests import post
-
-payload={
-    'client_name':'anotherone',
-    'redirect_uris':'localhost:5000'
-}
-
-def register_app():
-    resp = post('https://gts.werefox.cafe/api/v1/apps', data=payload)
-    return resp.text
-
-print(register_app())

requirements.txt

@@ -1,3 +1,3 @@
 Authlib>=1.2.0
 Flask>=2.2.3
-
+requests