feat: add K2V_ENDPOINT env var

README.md

@@ -11,11 +11,14 @@ import k2v "code.notaphish.fyi/milas/garage-k2v-go"
 
 ## Create API client
 ```go
-endpoint := "http://localhost:3904"
+// Read K2V_ENDPOINT from OS environment variable, e.g. http://localhost:3904.
+endpoint := k2v.EndpointFromEnv()
 
-// Read K2V_KEY_ID and K2V_SECRET_KEY from OS environment variables.
+// Read K2V_KEY_ID and K2V_KEY_SECRET from OS environment variables.
 key := k2v.KeyFromEnv()
-// key := k2v.Key{ID: "GK49e661847883e4813993a0db", Secret: "..."}
+
+// Alternatively, construct a key by initializing the ID and secret fields on a k2v.Key.
+// key := k2v.Key{ID: "GK...", Secret: "..."}
 
 client := k2v.NewClient(endpoint, key)
 ```
@@ -36,6 +39,14 @@ type Client
     func (c *Client) ReadItemSingle(ctx context.Context, b Bucket, pk string, sk string) (Item, CausalityToken, error)
 ```
 
+## Integration Tests
+```shell
+K2V_ENDPOINT="http://[::1]:3904" \
+K2V_KEY_ID="GK..." \
+K2V_KEY_SECRET="..." \
+  go test ./...
+```
+
 ## Usage
 Review the [K2V API spec][k2v-api] and the integration tests in this module for complete examples.