Added Docker healthcheck and projectsegfau instance (#131)

Dockerfile

@@ -7,6 +7,7 @@ COPY package.json yarn.lock ./
 RUN yarn install --frozen-lockfile
 
 FROM node:lts-alpine AS builder
+RUN apk add --no-cache curl
 WORKDIR /app
 
 RUN addgroup -g 1001 -S nodejs
@@ -23,6 +24,8 @@ ENV NODE_ENV production
 
 ENV NEXT_TELEMETRY_DISABLED 1
 
+HEALTHCHECK --interval=1m --timeout=3s CMD curl -f http://localhost:3000/ || exit 1
+
 CMD NEXT_PUBLIC_SITE_DOMAIN=$site_domain\
     NEXT_PUBLIC_FORCE_DEFAULT_THEME=$force_default_theme \
     NEXT_PUBLIC_DEFAULT_SOURCE_LANG=$default_source_lang \