Add persistence to make clients survive server restarts (#46)

Added persistence of devices, groups, tasks and their progress using the
diesel ORM and postgres. The server can be restarted without losing its state.

Test use individual Docker containers. Moreover, there are integration
tests that execute against the [headless client
tests](https://github.com/crocs-muni/meesign-client/blob/main/meesign_core/test/core_test.dart).

Author: quapka

.dockerignore

@@ -1 +1,13 @@
-./target/
+# Ignore local build artifacts
+./target/
+
+Dockerfile*
+.dockerignore
+
+# Ignore runtime configuration files
+.env
+./keys
+./integration-tests/.env
+
+# Ignore integration tests completely
+./integration-tests

.github/workflows/rust.yml

@@ -7,25 +7,31 @@ env:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v3
-    - name: Install latest stable
-      uses: actions-rs/toolchain@v1
-      with:
-        toolchain: stable
-        override: true
-        components: rustfmt, clippy
-    - name: Install protoc
-      uses: arduino/setup-protoc@v1
-      with:
-        version: 3.x
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --verbose
+      - uses: actions/checkout@v3
+      - name: Install latest stable
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+          components: rustfmt, clippy
+      - name: Install protoc
+        uses: arduino/setup-protoc@v1
+        with:
+          version: 3.x
+
+      - name: Build
+        run: cargo build --verbose
+
+      - name: Run only unit tests
+        run: cargo test --verbose
+
+      - name: Run also database tests
+        run: cargo test --verbose --features db-tests
+
+      - name: Run integration tests
+        run: ./run_integration_tests.sh
 
   build-n-release-docker-main:
     needs: build

.gitignore

@@ -4,3 +4,4 @@
 keys/
 MeeSignHelper.jar
 
+.env*