Update example for bash

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Author: alexellis

README.md

@@ -17,9 +17,9 @@ $ faas-cli deploy --image alexellis/inception --name inception --fprocess "pytho
 
 Invoke via `curl` or `faas-cli invoke`:
 
-```
-$ URL=https://upload.wikimedia.org/wikipedia/commons/6/61/Humpback_Whale_underwater_shot.jpg \
-  echo -n $URL | faas-cli invoke inception
+```sh
+export URL=https://upload.wikimedia.org/wikipedia/commons/6/61/Humpback_Whale_underwater_shot.jpg
+echo -n $URL | faas-cli invoke inception
 
 [{"name": "great white shark", "score": 0.5343291759490967}, {"name": "tiger shark", "score": 0.09276486188173294}, {"name": "grey whale", "score": 0.05899052694439888}, {"name": "sea lion", "score": 0.05105864629149437}, {"name": "hammerhead", "score": 0.019910583272576332}, {"name": "sturgeon", "score": 0.013177040033042431}, {"name": "stingray", "score": 0.00763126602396369}, {"name": "electric ray", "score": 0.006749240681529045}, {"name": "killer whale", "score": 0.005086909048259258}, {"name": "ice bear", "score": 0.003828041721135378}]
 ```
@@ -28,11 +28,12 @@ $ URL=https://upload.wikimedia.org/wikipedia/commons/6/61/Humpback_Whale_underwa
 
 * Use `jq` tool to filter the top matches:
 
+```sh
+export URL=https://upload.wikimedia.org/wikipedia/commons/6/61/Humpback_Whale_underwater_shot.jpg
+echo -n $URL | faas-cli invoke inception | jq '.[] | select(.score > 0.05)'
 ```
-$ URL=https://upload.wikimedia.org/wikipedia/commons/6/61/Humpback_Whale_underwater_shot.jpg \
-  echo -n $URL | faas-cli invoke inception \
-  | jq '.[] | select(.score > 0.05)'
 
+```json
 {
   "name": "great white shark",
   "score": 0.5343291759490967