Fixed some rendering issues

src/site/markdown/nginx-archiva.md

 # nginx configuration for Archiva
-
 Archiva only needs a basic HTTP Proxy configuration with [CloudFlare] Origin SSL.
 
-```archiva.conf
+```nginx.conf
 server {
   listen 0.0.0.0:80;
   listen [::]:80;

src/site/markdown/nginx-gitlab-pages.md

 # nginx for GitLab
-
 Only a few modifications here, for use with [CloudFlare] Origin SSL.
 
-```
+```nginx.conf
 ## GitLab
 ##
 

src/site/markdown/nginx-gitlab.md

 # nginx for GitLab
-
 Only a few modifications here, for use with [CloudFlare] Origin SSL.
 
-```
+```nginx.conf
 ## GitLab
 ##
 ## Lines starting with two hashes (##) are comments with information.

src/site/markdown/server-overall.md

 # Our Server
-
 Unfortunately, we were not able to use [FreeBSD] for this server, due to the fact [gRPC] was specifically designed by
 [Google] to not compile on FreeBSD.  Yes, we are aware there is a working gRPC in ports, but that does not help build
 the unbuildable rubygem.

src/site/markdown/your-tools.md

 # Your Basic Tools
-
 When using this server, the following configuration snips will be useful.
 
 These config files should be in these default locations: