Merge pull request #370 from carlosms/docs-add-readonly

Add GITBASE_READONLY to docs

Author: ajnavarro

docs/using-gitbase/configuration.md

@@ -2,15 +2,16 @@
 
 ## Environment variables
 
-| Name                         | Description                                                 |
-|:-----------------------------|:------------------------------------------------------------|
-| `BBLFSH_ENDPOINT`            | bblfshd endpoint, default "127.0.0.1:9432"                  |
-| `PILOSA_ENDPOINT`            | pilosa endpoint, default "http://localhost:10101"           |
-| `GITBASE_BLOBS_MAX_SIZE`     | maximum blob size to return in MiB, default 5 MiB           |
-| `GITBASE_BLOBS_ALLOW_BINARY` | enable retrieval of binary blobs, default `false`           |
-| `GITBASE_SKIP_GIT_ERRORS`    | do not stop queries on git errors, default disabled         |
-| `GITBASE_INDEX_DIR`          | directory to save indexes, default `/var/lib/gitbase/index` |
-| `GITBASE_TRACE`              | enable jaeger tracing, default disabled                     |
+| Name                         | Description                                                                        |
+|:-----------------------------|:-----------------------------------------------------------------------------------|
+| `BBLFSH_ENDPOINT`            | bblfshd endpoint, default "127.0.0.1:9432"                                         |
+| `PILOSA_ENDPOINT`            | pilosa endpoint, default "http://localhost:10101"                                  |
+| `GITBASE_BLOBS_MAX_SIZE`     | maximum blob size to return in MiB, default 5 MiB                                  |
+| `GITBASE_BLOBS_ALLOW_BINARY` | enable retrieval of binary blobs, default `false`                                  |
+| `GITBASE_SKIP_GIT_ERRORS`    | do not stop queries on git errors, default disabled                                |
+| `GITBASE_INDEX_DIR`          | directory to save indexes, default `/var/lib/gitbase/index`                        |
+| `GITBASE_TRACE`              | enable jaeger tracing, default disabled                                            |
+| `GITBASE_READONLY`           | allow read queries only, disabling creating and deleting indexes, default disabled |
 
 ### Jaeger tracing variables