Implement database infra utilities and tests for api (#118, #122)

- Adds unit and functional tests for api
- Adds docker compose with db init script to seed from dump
- Updates READMEs with relevant instructions

.github/workflows/validate-n-build-api.yml

@@ -7,7 +7,7 @@ on:
     branches: ["main"]
 
 jobs:
-  build:
+  validate-n-build:
     runs-on: ubuntu-latest
 
     steps:
@@ -24,12 +24,44 @@ jobs:
             shared:
               - 'shared/**'
 
+      - name: Check node_modules cache
+        id: deps-cache
+        uses: martijnhols/actions-cache/check@v3
+        env:
+          cache-name: api-deps-cache
+        with:
+          path: node_modules
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+
+      - name: Install Dependencies
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        run: |
+          cd api
+          npm install
+
+      - name: Cache node modules
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        uses: actions/cache@v3
+        env:
+          cache-name: api-deps-cache
+        with:
+          path: node_modules
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+
       - name: Validate API
         if: steps.filter.outputs.api == 'true' || steps.filter.outputs.shared == 'true'
         run: |
           cd api
-          npm install
-          npm run test:unit
+          npm test:unit
+
 
       - name: Build the Docker image for API
         if: steps.filter.outputs.api == 'true' || steps.filter.outputs.shared == 'true'