Add support to 12 factor charm

.github/workflows/pr.yml

@@ -2,20 +2,10 @@ name: PR checks
 on: pull_request
 
 env:
+  FLAKS_SECRET_KEY: insecure_test_key
   SECRET_KEY: insecure_test_key
 
 jobs:
-  run-image:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: Build image
-        run: DOCKER_BUILDKIT=1 docker build --tag dqlite-io .
-      - name: Run image
-        run: |
-          docker run -d -p 80:80 --env SECRET_KEY=insecure_secret_key dqlite-io
-          sleep 1 && curl --head --fail --retry-delay 5 --retry 10 --retry-connrefused http://localhost
-
   run-dotrun:
     runs-on: ubuntu-latest
 

app.py

@@ -0,0 +1 @@
+from webapp.app import app

rockcraft.yaml

@@ -0,0 +1,18 @@
+# Copyright 2023 Canonical Ltd.
+# See LICENSE file for licensing details.
+name: dqlite-io
+summary: OCI image for the dqlite.io site.
+description: OCI image for the dqlite.io site.
+version: "0.1"
+base: bare
+license: Apache-2.0
+
+parts:
+  flask/install-app:
+    prime:
+      - flask/app/static
+      - flask/app/webapp
+      - flask/app/templates
+
+extensions:
+  - flask-framework

webapp/app.py

@@ -1,3 +1,4 @@
+import os
 import talisker.requests
 
 # Packages
@@ -10,7 +11,9 @@
 from canonicalwebteam.search import build_search_view
 from flask import render_template, make_response
 
-# Rename your project below
+# TODO: make this a configuration parameter on flask-base
+os.environ["SECRET_KEY"] = os.environ["FLASK_SECRET_KEY"]
+
 app = FlaskBase(
     __name__,
     "dqlite.io",