Dockerfile: compile nginx v1.19.2 + use the latest Alpine version

Resolves #7

Author: macbre

Dockerfile

@@ -1,8 +1,10 @@
-FROM alpine:3.11
+FROM alpine:3.12
 
 LABEL maintainer="NGINX Docker Maintainers <[email protected]>"
 
-ENV NGINX_VERSION 1.18.0
+ENV NGINX_VERSION 1.19.2
+
+# https://github.com/google/ngx_brotli
 ENV NGX_BROTLI_COMMIT 25f86f0bac1101b6512135eac5f93c49c63609e3
 
 RUN GPG_KEYS=B0F4253373F8F6F510D42178520A9993A1C052F8 \