Add db and dindexer setup instructions

Setting-up-a-development-environment.md

@@ -47,7 +47,44 @@ Or, if you prefer a step-by-step list of commands:
     mkdir -p dindexer_build/debug
     cd dindexer_build/debug
     # in the following command replace ~/dindexer with the path to where you cloned the git repository
-    cmake -DCMAKE_BUILD_TYPE=Debug -DBUILD_TESTING=ON -DPBL_WITH_TESTS=off ~/dindexer
+    cmake -DCMAKE_BUILD_TYPE=Debug -DBUILD_TESTING=ON -DPBL_WITH_TESTS=off -DDB_OWNER_NAME=dindexer-user ~/dindexer
     cmake --build .
     ctest
-```
+```
+
+I personally like to have a directory structure like this for my code:
+
+    dev
+        code
+            dindexer  <-- my source code
+
+        build
+            dindexer
+                debug  <-- build files
+                release  <-- build files
+
+If you have a similar structure, it probably makes sense to have one shared location for your dindexer config file. In this case, pass the full path to cmake with the -DDINDEXER_CONFIG_FILE option:
+
+```bash
+    cd build/dindexer/debug
+    cmake -DDINDEXER_CONFIG_FILE=$HOME/dev/build/dindexer.yml .
+```
+
+This will override whatever default was chosen by the first invocation of cmake.
+
+## Setting up PostgreSQL
+Assuming you already have PostgreSQL already up and running, you need to create a new database and the tables that dindexer will use. Follow these steps:
+
+* Create a user if you want to have a separate user for dindexer - I generally call it dindexer-user. This has to match the value you passed to the -DDB_OWNER_NAME option in cmake.
+* Create a database, you can call it however you like but in this example I'll just call it dindexer-db
+* Build dindexer as explained in this page
+* Find a file called dindexer.sql in your build directory, it contains the schema you need to create.
+* If you are using pgadmin3, connect to the database you just created, then in the list on the left right-click on dindexer-db and choose Restore; in the popup dialog put the full path to dindexer.sql in the Filename field, choose dindexer-user as the Rolename and click the Restore button.
+
+## Setting up dindexer
+At this point you only need to tell dindexer the parameters to connect to PostgreSQL.
+
+* Copy the sample dindexer.yml from your source to where dindexer expects to find it - if you're not sure where you should put it, simply run `./dindexer -b` and look at the path next to the CONFIG_FILE_PATH field.
+* Open the configuration file you just copied and fill in the options with the right parameters to connect to PostgreSQL
+
+At this point you're ready to go. Try running `./dindexer locate test.txt`. You should get no output at all. If you get any error message instead, you're still missing something.