add example of http fetch to README

README.md

@@ -103,7 +103,26 @@ Example:
 $ tbd -vars testdata/sample1.vars testdata/sample1.yml.tbd
 ```
 
-> 👉 you can also specify an HTTP url to fetch your template and/or placeholders values.
+👉 you can also specify an HTTP url to fetch your template and/or placeholders values.
+
+Example:
+
+```sh
+$ tbd -vars https://raw.githubusercontent.com/lucasepe/tbd/main/testdata/sample2.vars \
+    https://raw.githubusercontent.com/lucasepe/tbd/main/testdata/sample2.txt.tbd
+```
+
+and the output is...
+
+```txt
+Greetings
+
+I will be out of the office from August, 9 until August 23. 
+If you need immediate assistance while I’m away, please email [email protected].
+
+Best,
+Pinco Pallo
+```
 
 ## How to list all template placeholders?
 

go.mod

@@ -1,3 +1,5 @@
 module github.com/lucasepe/tbd
 
 go 1.16
+
+require github.com/google/go-cmp v0.5.5

go.sum

@@ -0,0 +1,4 @@
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=