[openstreetmap/openstreetmap-website] [WIP] Add docker support (#2272)

[Colin Smale]

Cancel that, found the answer already. Now it all falls into place.
Sorry for the interruption!

On 2019-06-22 13:42, Colin Smale wrote:

> Can someone please explain what the "UNIX socket vs Docker TCP connection issue" is all about? I am not a deep Docker expert, but I have some experience (including Kubernetes and OpenStack) and know a lot about UNIX, Linux and networking, but my brain can't imagine what this is actually about.
> 
> On 2019-06-22 12:28, Fazle Rabbi wrote: 
> 
> The developmentseed repo I mentioned earlier in this issue uses TCP connections instead of unix sockets to connect to he postgresql database. 
> 
> come to think of it, wouldn't that UNIX socket vs Docker tpc connection issue be applicable for rake db:migrate command as well? As far as I understand it also connects to the db PostgreSQL image and creates tables and function and it works ok. If so why it fails only on rake test:db. While I investigate that may be @gravitystorm [1] and @tomhughes [2] and help me understand the process better!? 
> 
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