Run tests on PR, add initial build action

.gitea/workflows/build_and_publish.yaml

@@ -0,0 +1,20 @@
+name: Run unit tests
+run-name: ${{ gitea.repository }} PHP unit tests
+on:
+  push:
+    tags:
+      - v*.**
+
+jobs:
+  build_and_publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build archive
+        run: |
+          tar \
+            --exclude='./storage/db' \
+            --exclude='./storage/ticks' \
+            --exclude='./storage/upload' \
+            -czpvf tkr.${{ gitea.ref_name }}.tgz \
+            config public src storage templates

.gitea/workflows/unit_tests.yaml

@@ -1,6 +1,6 @@
 name: Run unit tests
 run-name: ${{ gitea.repository }} PHP unit tests
-on: [push]
+on: [push, pull_request]
 
 jobs:
   run-unit-tests:

.gitignore

@@ -13,3 +13,6 @@ storage/upload/css
 # Testing stuff
 /docker-compose.yml
 scratch
+
+# Build artifacts
+tkr.tgz