We now have an e-mission-server image that includes miniconda and the basic
conda environment needed for e-mission. We have already changed the production
Dockerfile so that it is built off the image, and doesn't need to reinstall
conda and similar.

makes it similar to the production Dockerfile
e-mission@e45af89

…ed correctly

Bug reported by a user.
We should only use backticks for the text, not the value
Using backticks for the value as well results in

```
<img src="plots/`miles_e-bike_replaced_mode`_2023_06_default.png" alt="null" width="90%" height="90%">
```

instead of

```
<img src="plots/ntrips_e-bike_purpose_default.png" alt="Pie chart of Number of trips for each purpose for e-bike only
```

Simple one-line fix to make it like the purpose, which works

Testing done: None
This is pretty simple and I don't have an intern working on the public dashboard yet