Docker healthcheck added, CI updated, docker image build optimized (#10)

.github/workflows/tests.yml

@@ -2,13 +2,23 @@ name: tests
 
 on:
   push:
-    branches:
-      - master
-    tags-ignore:
-      - '**'
-  pull_request:
+    branches: [master, main]
+    tags-ignore: ['**']
+  pull_request: {}
 
 jobs: # Docs: <https://git.io/JvxXE>
+  gitleaks:
+    name: Gitleaks
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Check for GitLeaks
+        uses: zricethezav/gitleaks-action@v1.6.0 # Action page: <https://github.com/zricethezav/gitleaks-action>
+
   build-image:
     name: Build docker image
     runs-on: ubuntu-20.04
@@ -36,6 +46,28 @@ jobs: # Docs: <https://git.io/JvxXE>
           path: ./docker-image.tar
           retention-days: 1
 
+  scan-image:
+    name: Scan docker image
+    runs-on: ubuntu-20.04
+    needs: [build-image]
+    steps:
+      - name: Download built docker image
+        uses: actions/download-artifact@v2
+        with:
+          name: docker-image
+          path: .artifact
+
+      - name: Prepare image to run
+        working-directory: .artifact
+        run: docker load < docker-image.tar
+
+      - name: Scan image
+        uses: anchore/scan-action@v3 # action page: <https://github.com/anchore/scan-action>
+        with:
+          image: 3proxy:local
+          fail-build: true
+          severity-cutoff: low # negligible, low, medium, high or critical
+
   try-to-use:
     name: Build and use docker image (auth ${{ matrix.auth }})
     runs-on: ubuntu-20.04