Fix Docker: add nginx volume, simplify entrypoint

Dockerfile

@@ -1,7 +1,7 @@
 # Stage 1: Build frontend
 FROM node:20-alpine AS builder
 
-WORKDIR /app
+WORKDIR /build
 
 COPY package*.json ./
 RUN npm ci
@@ -14,24 +14,20 @@ FROM node:20-alpine
 
 WORKDIR /app
 
-# Install MariaDB and nginx
-RUN apk add --no-cache mariadb mariadb-client mariadb-server-utils nginx
+# Install dependencies
+RUN apk add --no-cache mariadb mariadb-client mariadb-server-utils nginx bash
 
-# Initialize MariaDB data directory
-RUN mkdir -p /run/mysqld /var/lib/mysql && \
-    chown -R mysql:mysql /run/mysqld /var/lib/mysql
+# Initialize directories
+RUN mkdir -p /run/mysqld /var/lib/mysql && chown -R mysql:mysql /run/mysqld /var/lib/mysql
 
-# Copy MariaDB config
-RUN sed -i 's/\[mysqld\]/[mysqld]\ncharacter-set-server=utf8mb4\ncollation-server=utf8mb4_unicode_ci/' /etc/my.cnf.d/mariadb.cnf || true
-
-# Copy built frontend
-COPY --from=builder /app/dist /usr/share/nginx/html
+# Copy built frontend to nginx
+COPY --from=builder /build/dist /usr/share/nginx/html
 
 # Copy server files
-COPY server/package*.json server/
-RUN cd server && npm ci
+COPY server/package*.json ./server/
+RUN cd ./server && npm ci
 
-COPY server/ server/
+COPY server/ ./server/
 
 # Copy nginx config
 COPY nginx.conf /etc/nginx/http.d/default.conf
@@ -39,7 +35,7 @@ COPY nginx.conf /etc/nginx/http.d/default.conf
 # Create directories
 RUN mkdir -p /run/nginx /run/mysqld /var/lib/mysql
 
-# Copy entrypoint script
+# Copy entrypoint
 COPY docker-entrypoint.sh /docker-entrypoint.sh
 RUN chmod +x /docker-entrypoint.sh