dev docs

doc/dev.md

@@ -1,4 +1,73 @@
 
 # System overview
 
-<img src="./Overview.png">
+<img src="./Overview.png">
+
+# Build dependencies
+
+## Basic
+* go >= 1.11
+* make
+
+## With crosscompiling (optional)
+Either apt-get:
+* gcc-mingw-w64
+* gcc-5-arm-linux-gnueabihf
+* gcc-i686-linux-gnu
+
+Or use the docker-builder image in `server/docker`
+
+# Development setup
+
+Working directory: `./server`
+
+## Preparing the files and map
+
+Copy your `map.sqlite` into the working directory if you want to test with
+a sqlite map database
+
+### world.mt
+
+You need a `world.mt` too in order to make the connection to the database.
+In the sqlite case:
+
+```
+gameid = minetest
+backend = sqlite3
+creative_mode = false
+enable_damage = false
+player_backend = files
+```
+
+For postgres:
+```
+gameid = minetest
+backend = postgresql
+creative_mode = true
+enable_damage = true
+player_backend = postgresql
+pgsql_connection = host=localhost port=5432 user=postgres password=enter dbname=postgres
+pgsql_player_connection = host=localhost port=5432 user=postgres password=enter dbname=postgres
+```
+
+## Generate the static files (webserver vfs)
+
+* Create the vfs (in `vfs/static.go`) with `go generate`
+
+## Running the server
+
+* Create a `mapserver.json` with `go run . -createconfig`
+* Change the value `webdev` in the `mapserver.json` to `true`
+* Start the server with `go run .` or with debug output: `go run . -debug`
+* The web files in `static/` can now be changed on the fly without restarting the server
+
+# Release build
+
+Prerequisites:
+* docker
+
+Building:
+* Build the docker-image in the `docker` directory with: `cd docker && make build`
+* Run `make clean build-docker` to build for all supported targets
+
+The artifacts should now be in the `output` directory