Add custom Docker image for FE E2E tests

Woodpecker cannot do custom commands for services.

docker-entrypoint-e2e.sh

@@ -0,0 +1,70 @@
+#!/bin/ash
+set -eu
+
+SEED_SENTINEL_PATH=/var/lib/pleroma/.e2e_seeded
+CONFIG_OVERRIDE_PATH=/var/lib/pleroma/config.exs
+
+echo '-- Waiting for database...'
+while ! pg_isready -U ${DB_USER:-pleroma} -d postgres://${DB_HOST:-db}:${DB_PORT:-5432}/${DB_NAME:-pleroma} -t 1; do
+	sleep 1s
+done
+
+echo '-- Writing E2E config overrides...'
+cat > $CONFIG_OVERRIDE_PATH <<EOF
+import Config
+
+config :pleroma, Pleroma.Captcha,
+	enabled: false
+
+config :pleroma, :instance,
+	registrations_open: true,
+	account_activation_required: false,
+	approval_required: false
+EOF
+
+echo '-- Running migrations...'
+/opt/pleroma/bin/pleroma_ctl migrate
+
+echo '-- Starting!'
+/opt/pleroma/bin/pleroma start &
+PLEROMA_PID=$!
+
+cleanup() {
+	if kill -0 $PLEROMA_PID 2>/dev/null; then
+		kill -TERM $PLEROMA_PID
+		wait $PLEROMA_PID || true
+	fi
+}
+
+trap cleanup INT TERM
+
+echo '-- Waiting for API...'
+api_ok=false
+for _i in $(seq 1 120); do
+	if wget -qO- http://127.0.0.1:4000/api/v1/instance >/dev/null 2>&1; then
+		api_ok=true
+		break
+	fi
+	sleep 1s
+done
+
+if [ $api_ok != true ]; then
+	echo 'Timed out waiting for Pleroma API to become available'
+	exit 1
+fi
+
+if [ ! -f $SEED_SENTINEL_PATH ]; then
+	if [ -n ${E2E_ADMIN_USERNAME:-} ] && [ -n ${E2E_ADMIN_PASSWORD:-} ] && [ -n ${E2E_ADMIN_EMAIL:-} ]; then
+		echo '-- Seeding admin user' $E2E_ADMIN_USERNAME '...'
+		if ! /opt/pleroma/bin/pleroma_ctl user new $E2E_ADMIN_USERNAME $E2E_ADMIN_EMAIL --admin --password $E2E_ADMIN_PASSWORD -y; then
+			echo '-- User already exists or creation failed, ensuring admin + confirmed...'
+			/opt/pleroma/bin/pleroma_ctl user set $E2E_ADMIN_USERNAME --admin --confirmed
+		fi
+	else
+		echo '-- Skipping admin seeding (missing E2E_ADMIN_* env)'
+	fi
+
+	touch $SEED_SENTINEL_PATH
+fi
+
+wait $PLEROMA_PID