Fix absolute and relative paths

lua/MarkdownPreviewer/app.lua

@@ -20,7 +20,8 @@ end
 
 app = {
     cmd = nil,
-    channel = nil
+    channel = nil,
+    cwd = nil
 }
 
 function app:init(on_exit)
@@ -28,9 +29,9 @@ function app:init(on_exit)
         return
     end
 
-    local cwd = debug.getinfo(1, 'S').source:sub(2):match('(.*[/\\])')
+    self.cwd = debug.getinfo(1, 'S').source:sub(2):match('(.*[/\\])')
     self.channel = vim.fn.jobstart(self.cmd, {
-        cwd = cwd,
+        cwd = self.cwd,
         stderr_buffered = true,
         on_exit = function()
             vim.fn.chanclose(self.channel)
@@ -75,11 +76,13 @@ function module.setup()
     setmetatable(o, app)
     app.__index = app
 
+    local cwd = debug.getinfo(1, 'S').source:sub(2):match('(.*[/\\])')
+    local base_location = cwd:gsub("lua/MarkdownPreviewer", "")
+
     o.cmd = {
-        "../../Server/run.sh",
-        "../../Server/venv",
-        'python3',
-        '../../Server/server.py'
+        base_location .. "Server/test.pex",
+        "--base",
+        base_location
     }
 
     return o