Create directory /data in dockerfile and point files to there

Added troubleshooting

FundaScraper/App/WebhookDB.cs

@@ -46,8 +46,6 @@ private async Task SaveHistoryFile(DbModel model)
     {
         var json = JsonSerializer.Serialize(model);
 
-        Directory.CreateDirectory(Path.GetDirectoryName(WebhooksHistoryJson)!);
-
         await File.WriteAllTextAsync(WebhooksHistoryJson, json);
     }
 }

FundaScraper/Constants.cs

@@ -4,7 +4,8 @@ internal static class Constants
 {
     internal static class FileNames
     {
-        internal static string WebhooksHistoryJson = Path.Combine("/home", "app", "data", "webhooks-history.json");
-        internal static string ResultsFilePath = Path.Combine("/home", "app", "data", "results.csv");
+        private static string BasePath = Path.Combine("/", "data");
+        internal static string WebhooksHistoryJson = Path.Combine(BasePath, "webhooks-history.json");
+        internal static string ResultsFilePath = Path.Combine(BasePath, "results.csv");
     }
 }

FundaScraper/Dockerfile

@@ -12,9 +12,11 @@ RUN apt-get update \
 
 ENV PUPPETEER_EXECUTABLE_PATH "/usr/bin/google-chrome-stable"
 
+RUN mkdir -p /data
+RUN chown -R app /data
+
 USER app
-RUN mkdir /home/app/data
-WORKDIR /home/app
+WORKDIR /app
 
 COPY ./publish .
 

FundaScraper/FundaScraper.csproj

@@ -6,7 +6,7 @@
 		<ImplicitUsings>enable</ImplicitUsings>
 		<Nullable>enable</Nullable>
 		<DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
-		<Version>1.0.3</Version>
+		<Version>1.2.0</Version>
 	</PropertyGroup>
 
 	<ItemGroup>

README.md

@@ -25,7 +25,7 @@ Note `--tty` and `--cap-add=SYS_ADMIN` are required.
 
 ```bash
 docker run --tty \
-    -v /data/fundascraper:/home/app/data \
+    -v /data/fundascraper:/data \
     -e FUNDA_URL="https://www.funda.nl/zoeken/koop?selected_area=%5B%22amsterdam%22%5D&object_type=%5B%22house%22%5D&price=%22-450000%22" \
     -e WEBHOOK_URL="http://homeassistantlocal.ip/api/webhook/123-redacted-key" \
     ghcr.io/marcel0024/funda-scraper:latest
@@ -43,7 +43,7 @@ services:
       - FUNDA_URL=https://www.funda.nl/zoeken/koop?selected_area=%5B%22amsterdam%22%5D&object_type=%5B%22house%22%5D&price=%22-450000%22
       - WEBHOOK_URL=http://homeassistantlocal.ip/api/webhook/123-redacted-key
     volumes:
-      - /data/fundascraper:/home/app/data
+      - /data/fundascraper:/data
 ```
 
 ## Environment Variables
@@ -105,3 +105,17 @@ action:
         clickAction: "{{ trigger.json.url }}"
 mode: single
 ```
+
+
+## Troubleshoot/Common issues
+
+### UnauthorizedAccessException: Access to the path '/data/results.csv' is denied
+
+The app inside the container is running as non-root user. So the application is running as the predefined `app` user which has UID 64198. 
+
+For it to be able to create files in the mounted directory, UID 64198 needs to be able to create files on the host in the `/data/fundascraper` directory (the one defined in the volume).
+
+You can do that by giving public write access on the host using `chmod o+w /data/fundascraper`.
+
+If that's too permissive, you can create a user on the host with UID 64198 and give that user group access to the directory.
+