Make server configurable

[whysthatso]

What kind of change does this PR introduce? (check at least one)

• [ ] Bugfix
• [x ] Feature
• [x ] Code style update
• [ ] Refactor
• [ ] Build-related changes
• [ ] Other, please describe:

Does this PR introduce a breaking change? (check one)

• [ ] Yes
• [x ] No

The PR fulfills these requirements:

• [x ] All tests are passing
• [x ] New/updated tests are included

If adding a new feature, the PR's description includes:

• [ ] plausible can be selfhosted under an individual domain, and in order to make the plugin usable for that kind of crowd, the feature is a requirement

Other information: i've bumped up the bridgetown version to 1.1.0. i thin that led to a changed directory structure which in turn required test adjustments. i've not dug too much into that, so maybe something else was the reason:

• i.e. fixture output is now /dest/erb/index.html as opposed to /dest/erb.html

[whysthatso]

hm, i hope i did it alright with the mix of committing suggestions and resolving conversations. i'm not very versed in the whole github pr workflow, but i really appreciate it. also including the proper contribution steps into the project right from the start was very wise, i think.

i think there is no controversy here, just do as you see fit for the rest of the things. it's a small feature detail after all :)

btw thanks for all the work. also the podcast :D

[whysthatso]

ok, so i just took some action here, i hope it's all in your favor as well.

[andrewmcodes]

@whysthatso thanks for the contribution! I just released v1.1.0 with these changes.

[whysthatso]

so cool 🤗 thanks.