fix: replace npm ci --only=production with npm install --omit=dev for Railway build

Signed-off-by: rigoryanych <rigoryanych1397@gmail.com>

Author: rigoryanych

Dockerfile

@@ -6,7 +6,7 @@ COPY package*.json ./
 COPY tsconfig.json ./
 
 # Install dependencies
-RUN npm ci --only=production
+RUN npm install --omit=dev
 
 # Copy source code
 COPY src/ ./src/