Devenv: Fix Prometheus basic auth proxy (#28889)

* prometheus basic auth proxy: Pin base image version

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

* prometheus basic auth proxy: Don't use host network mode

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

* prometheus basic auth proxy: Enable logging

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

* prometheus basic auth proxy: Fix Dockerfile location

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

devenv/docker/blocks/prometheus_basic_auth_proxy/Dockerfile

-FROM nginx:alpine
+FROM nginx:1.19.3-alpine
 
 COPY nginx.conf /etc/nginx/nginx.conf
 COPY htpasswd /etc/nginx/htpasswd

devenv/docker/blocks/prometheus_basic_auth_proxy/docker-compose.yaml

@@ -2,5 +2,6 @@
 # http://prometheus:9090 (Prometheus inside the docker compose)
 
   nginxproxy:
-    build: docker/blocks/nginx_proxy
-    network_mode: host
+    build: docker/blocks/prometheus_basic_auth_proxy
+    ports:
+      - "10090:10090"

devenv/docker/blocks/prometheus_basic_auth_proxy/nginx.conf

@@ -2,6 +2,7 @@ events { }
 
 http {
   server {
+    error_log stderr info;
 
     listen 10090;