Heroku无法正常工作，我不知道从哪里开始

Question

I apologize for this being a vague question but I don't know what is going wrong so I don't know how to ask the questions.

I set up a rails app and it's working locally. However, when creating it on Heroku Create and it gets set up on my Heroku server it does not work. When I run Heroku open I get this page:

https://polar-taiga-65467.herokuapp.com/

I can post logs or anything else to help. If someone can help me figure out what to do from here it would be appreciated.

Here is my GitHub project: https://github.com/TomTom319/morali-tee

Here is the log from Heroku:

2018-01-16T05:13:18.292500+00:00 app[web.1]: I,
[2018-01-16T05:13:18.292411 #4]  INFO -- :
[99bf3dd0-59b3-4438-a3f7-36a037174b55]   Rendering simple_pages/index.html.erb within layouts/application
2018-01-16T05:13:18.295106+00:00 app[web.1]:
[99bf3dd0-59b3-4438-a3f7-36a037174b55]     3:  2018-01-16T05:13:18.293930+00:00 app[web.1]: I,
[2018-01-16T05:13:18.293863 #4]  INFO -- :
[99bf3dd0-59b3-4438-a3f7-36a037174b55]   Rendered simple_pages/index.html.erb within layouts/application (1.3ms)
2018-01-16T05:13:18.294179+00:00 app[web.1]: I,
[2018-01-16T05:13:18.294089 #4]  INFO -- :
[99bf3dd0-59b3-4438-a3f7-36a037174b55] Completed 500 Internal Server Error in 15ms 2018-01-16T05:13:18.294881+00:00 app[web.1]: F,
[2018-01-16T05:13:18.294798 #4] FATAL -- :
[99bf3dd0-59b3-4438-a3f7-36a037174b55]    2018-01-16T05:13:18.295107+00:00 app[web.1]:
[99bf3dd0-59b3-4438-a3f7-36a037174b55]     4: <%= image_tag("yellowtee", class: "img-responsive first-tee")%>
2018-01-16T05:13:18.295101+00:00 app[web.1]: F,
[2018-01-16T05:13:18.295028 #4] FATAL -- :
[99bf3dd0-59b3-4438-a3f7-36a037174b55]     1: <h1 style="color:red;">MoraliTee</h1> 2018-01-16T05:13:18.295104+00:00
app[web.1]: [99bf3dd0-59b3-4438-a3f7-36a037174b55]     2: <p>Welcome! We are on a mission to give back to people around the world</p>
2018-01-16T05:13:18.295158+00:00 app[web.1]: F,
[2018-01-16T05:13:18.295086 #4] FATAL -- :
[99bf3dd0-59b3-4438-a3f7-36a037174b55]    2018-01-16T05:13:18.760114+00:00 heroku[router]: at=info method=GET
path="/favicon.ico" host=polar-taiga-65467.herokuapp.com
request_id=6a2ec4b7-7054-46b7-b76a-28ef5ab3f69a fwd="24.15.217.85"
dyno=web.1 connect=0ms service=2ms status=200 bytes=143 protocol=https
2018-01-16T05:13:18.293286+00:00 heroku[router]: at=info method=GET
path="/" host=polar-taiga-65467.herokuapp.com
request_id=99bf3dd0-59b3-4438-a3f7-36a037174b55 fwd="24.15.217.85" dyno=web.1 connect=0ms service=22ms status=500 bytes=1827
protocol=https

Simple_pages/index.html.erb code below:

<h1 style="color:red;">MoraliTee</h1>
<p>Welcome! We are on a mission to give back to people around the 
world</p>

<%= image_tag("yellowtee", class: "img-responsive first-tee")%>

Answer 1

There was a file type missing from the end of my image on my simple_pages/index.html.erb page. I needed to .jpg to the end of my source in my image_tag.

Thank you @mmichael for your help in identifying the issue.

I thought there was something wrong with my db but I was incorrect. Thanks for your help.