feat: Add docker compose file for a containerized development environment

[michaeljdennis]

Fixes #49

Checklist

• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the [Contribution Guide] and my PR follows them.
• I updated my branch with the master branch.
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation about the functionality in the appropriate .md file
• I have added in line documentation to the code I modified

Short description of what this PR does:

This PR adds a docker compose file for a containerized development environment.

[thinkingserious]

Hello @michaeljdennis,

When I try to run this, I get a

Recoverable fatal error: Object of class SendGrid\Client could not be converted to string in /php-http-client/examples/example.php on line 19

when I click on the example.php link from localhost:8080.

When you clicked on that link did you receive the right response?

With Best Regards,

Elmer

[michaeljdennis]

Hi @thinkingserious. I will take a look and get back to you.

[thinkingserious]

Awesome, thanks @michaeljdennis!

[codecov]

Codecov Report

Merging #80 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master      #80   +/-   ##
=======================================
  Coverage   80.87%   80.87%           
=======================================
  Files           3        3           
  Lines         183      183           
=======================================
  Hits          148      148           
  Misses         35       35

Impacted Files	Coverage Δ
lib/Client.php	77.33% <100%> (ø)	⬆️

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[michaeljdennis]

Hi @thinkingserious,

I looked into this a bit and found that some methods had been lost in a merge. I have re-added them in the commits above. Also, it appears that the master branch has errors that are similar to the one you reported when running the example file. All unit tests are passing though, so we may need to look into those. I have included fixes that allow the example file to be run successfully. Please let me know if it works for you now.

[thinkingserious]

Awesome @michaeljdennis!

I've updated the status of this issue in our backlog.

[thinkingserious]

Thank you for the PR!

When I try to run this, I get the following error:

int(403) string(56) "{"errors":[{"field":null,"message":"access forbidden"}]}"

int(403) string(56) "{"errors":[{"field":null,"message":"access forbidden"}]}"

int(403) string(56) "{"errors":[{"field":null,"message":"access forbidden"}]}"

int(403) string(56) "{"errors":[{"field":null,"message":"access forbidden"}]}"

int(403) string(56) "{"errors":[{"field":null,"message":"access forbidden"}]}"

int(403) string(56) "{"errors":[{"field":null,"message":"access forbidden"}]}"

int(403) string(56) "{"errors":[{"field":null,"message":"access forbidden"}]}"

[thinkingserious]

Missing closing parenthesis.

[thinkingserious]

Closing until PR feedback is addressed.