Create Dockerfile

Dockerfile

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+# -----------------------------
+# Keycloak with SQLite (POC)
+# -----------------------------
+
+ARG KEYCLOAK_VERSION=25.0
+FROM quay.io/keycloak/keycloak:${KEYCLOAK_VERSION} AS builder
+
+# Enable health & metrics (optional but useful)
+ENV KC_HEALTH_ENABLED=true \
+    KC_METRICS_ENABLED=true
+
+# Build Keycloak runtime (Quarkus optimized)
+RUN /opt/keycloak/bin/kc.sh build
+
+# -----------------------------
+# Runtime image
+# -----------------------------
+FROM quay.io/keycloak/keycloak:${KEYCLOAK_VERSION}
+
+# Default to SQLite database
+ENV KC_DB=sqlite \
+    KC_DB_URL=jdbc:sqlite:/opt/keycloak/data/keycloak.db \
+    KEYCLOAK_ADMIN=admin \
+    KEYCLOAK_ADMIN_PASSWORD=admin \
+    KC_HEALTH_ENABLED=true \
+    KC_METRICS_ENABLED=true
+
+# Copy optimized server from builder stage
+COPY --from=builder /opt/keycloak/ /opt/keycloak/
+
+# Persist DB file in container volume
+VOLUME ["/opt/keycloak/data"]
+
+# Expose admin/dev ports
+EXPOSE 8080 8443
+
+ENTRYPOINT ["/opt/keycloak/bin/kc.sh"]
+CMD ["start", "--optimized"]