update: Allow configuring of echo-server address

[leighmacdonald]

Enables custom laravel-echo-server address without hard coding. Uses .env config.

[codecov]

Codecov Report

Merging #1476 into master will decrease coverage by 0.71%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1476      +/-   ##
============================================
- Coverage     25.42%   24.71%   -0.72%     
  Complexity     4491     4491              
============================================
  Files           342      342              
  Lines         14192    14192              
============================================
- Hits           3609     3507     -102     
- Misses        10583    10685     +102     

Impacted Files	Coverage Δ	Complexity Δ
app/Jobs/ProcessMassPM.php	0.00% <0.00%> (-100.00%)	2.00% <0.00%> (ø%)
app/Notifications/NewFollow.php	0.00% <0.00%> (-100.00%)	3.00% <0.00%> (ø%)
app/Services/Tmdb/TMDB.php	0.00% <0.00%> (-77.78%)	11.00% <0.00%> (ø%)
app/Jobs/ProcessMovieJob.php	0.00% <0.00%> (-70.28%)	10.00% <0.00%> (ø%)
app/Models/Genre.php	0.00% <0.00%> (-50.00%)	2.00% <0.00%> (ø%)
app/Models/Company.php	0.00% <0.00%> (-50.00%)	2.00% <0.00%> (ø%)
app/Services/Tmdb/TMDBScraper.php	2.27% <0.00%> (-36.37%)	13.00% <0.00%> (ø%)
app/Services/Tmdb/Client/Person.php	0.00% <0.00%> (-25.72%)	15.00% <0.00%> (ø%)
app/Models/Cast.php	0.00% <0.00%> (-25.00%)	4.00% <0.00%> (ø%)
app/Models/Crew.php	0.00% <0.00%> (-25.00%)	4.00% <0.00%> (ø%)
... and 12 more

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[HDVinnie]

Ill merge this soon. Have to update installer stub at same time so no conflicts.