Try fixing CI.

.github/workflows/general.yml

@@ -32,10 +32,14 @@ jobs:
           toolchain: stable
           override: true
       - name: Migrate database
+        env:
+          # Weird networking issue in GitHub actions... It fails with 'connection refused' if we use 'localhost'.
+            POSTGRES_HOST: postgres
+            SKIP_DOCKER: true
         run: |
           sudo apt-get install libpq-dev -y
           cargo install --version=0.2.0 sqlx-cli --no-default-features --features postgres
-          SKIP_DOCKER=true ./scripts/init_db.sh
+          ./scripts/init_db.sh
       - uses: actions-rs/cargo@v1
         with:
           command: test

scripts/init_db.sh

@@ -10,6 +10,8 @@ DB_PASSWORD="${POSTGRES_PASSWORD:=password}"
 DB_NAME="${POSTGRES_DB:=newsletter}"
 # Check if a custom port has been set, otherwise default to '5432'
 DB_PORT="${POSTGRES_PORT:=5432}"
+# Check if a custom host has been set, otherwise default to 'localhost'
+DB_HOST="${POSTGRES_HOST:=localhost}"
 
 # Allow to skip Docker if a dockerized Postgres database is already running
 if [[ -z "${SKIP_DOCKER}" ]]
@@ -26,7 +28,7 @@ then
 fi
 
 # Keep pinging Postgres until it's ready to accept commands
-until PGPASSWORD="${DB_PASSWORD}" psql -h "localhost" -U "${DB_USER}" -p "${DB_PORT}" -d "postgres" -c '\q'; do
+until PGPASSWORD="${DB_PASSWORD}" psql -h "${DB_HOST}" -U "${DB_USER}" -p "${DB_PORT}" -d "postgres" -c '\q'; do
   >&2 echo "Postgres is still unavailable - sleeping"
   sleep 1
 done