chore(deps): update nginx:alpine docker digest to b3c656d

Author: renovate[bot]

balancer/Dockerfile

@@ -1,4 +1,4 @@
-FROM nginx:alpine@sha256:44e208ac2000daeff77c27a409d1794d6bbdf52067de627c2da13e36c7d59582
+FROM nginx:alpine@sha256:b3c656d55d7ad751196f21b7fd2e8d4da9cb430e32f646adcf92441b72f82b14
 RUN apk add gettext
 COPY ./nginx.conf /etc/nginx/nginx.conf
 CMD envsubst '\$DOMAIN' < /etc/nginx/nginx.conf > /etc/nginx/nginx.conf && nginx -g 'daemon off;'