MEga push vol idk, chat function updates, docker fixes

Dockerfile

@@ -1,43 +1,59 @@
-# Build stage
+# ── Build stage ──
 FROM node:22-alpine AS builder
 
 WORKDIR /app
 
-# Copy package files
+# Build args needed by $env/static/public at build time
+ARG PUBLIC_SUPABASE_URL
+ARG PUBLIC_SUPABASE_ANON_KEY
+
+# Copy package files first for better layer caching
 COPY package*.json ./
 
-# Install all dependencies (including dev)
+# Install all dependencies (including dev) needed for the build
 RUN npm ci
 
 # Copy source files
 COPY . .
 
-# Build the application
+# Build the SvelteKit application
 RUN npm run build
 
-# Prune dev dependencies
-RUN npm prune --production
+# ── Production dependencies stage ──
+FROM node:22-alpine AS deps
 
-# Production stage
+WORKDIR /app
+
+COPY package*.json ./
+
+# Install only production dependencies
+RUN npm ci --omit=dev
+
+# ── Runtime stage ──
 FROM node:22-alpine
 
 WORKDIR /app
 
-# Copy built application
+# Copy built application and production deps
 COPY --from=builder /app/build build/
-COPY --from=builder /app/node_modules node_modules/
+COPY --from=deps /app/node_modules node_modules/
 COPY package.json .
 
 # Expose port
 EXPOSE 3000
 
-# Set environment
+# Set environment defaults
 ENV NODE_ENV=production
 ENV PORT=3000
 ENV HOST=0.0.0.0
+# SvelteKit node adapter needs ORIGIN for CSRF protection
+# Override at runtime via docker-compose or -e flag
+ENV ORIGIN=http://localhost:3000
+# Allow file uploads up to 10 MB
+ENV BODY_SIZE_LIMIT=10485760
 
 # Health check
-HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
   CMD wget --no-verbose --tries=1 --spider http://localhost:3000/health || exit 1
 
 # Run the application