Add github action to build on multiple platforms

Signed-off-by: trivernis <trivernis@protonmail.com>

mediarepo-api/.github/workflows/build.yml

@@ -0,0 +1,33 @@
+name: Build on multiple platforms
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main, develop ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Cache build data
+        uses: actions/cache@v2
+        with:
+          path: |
+            target
+            ~/.cargo/
+          key: ${{ runner.os }}-cargo-${{ hashFiles('Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-cargo-
+      - name: Build
+        run: cargo build --verbose